Sets mixer device string for the specified sound device.
PRL_RESULT PrlVmDevSound_SetMixerDev( PRL_HANDLE hVmDev, PRL_CONST_STR sNewMixerDev );
PrlApiVm.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.